EP3048194B1 - Kantenhaltevorrichtung für webmaschinen, webmaschine und verfahren zur herstellung eines gewebes - Google Patents

Kantenhaltevorrichtung für webmaschinen, webmaschine und verfahren zur herstellung eines gewebes Download PDF

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Publication number
EP3048194B1
EP3048194B1 EP14846374.8A EP14846374A EP3048194B1 EP 3048194 B1 EP3048194 B1 EP 3048194B1 EP 14846374 A EP14846374 A EP 14846374A EP 3048194 B1 EP3048194 B1 EP 3048194B1
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EP
European Patent Office
Prior art keywords
selvage portion
weft yarn
yarns
woven fabric
loom
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Application number
EP14846374.8A
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English (en)
French (fr)
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EP3048194A4 (de
EP3048194A1 (de
Inventor
Nobuaki Tanaka
Hiroshi Tsuchikura
Koji Shimada
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Toray Industries Inc
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Toray Industries Inc
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Publication of EP3048194A1 publication Critical patent/EP3048194A1/de
Publication of EP3048194A4 publication Critical patent/EP3048194A4/de
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Publication of EP3048194B1 publication Critical patent/EP3048194B1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/40—Forming selvedges
    • D03D47/42—Forming selvedges by knitting or interlacing loops of weft
    • D03D47/44—Forming selvedges by knitting or interlacing loops of weft with additional selvedge thread
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the present invention involves a selvage portion gripping device for a loom, more specifically, the present invention involves a selvage portion gripping device for a loom for effectively suppressing occurrence of warp yarn looseness in a base cloth selvage portion that occurs near a selvage portion when a high-density woven fabric is woven.
  • the present invention relates to a loom equipped with the device, and a method for manufacturing the woven fabric using the device.
  • cover factor is a value expressed by (D1 x 0. 9) 1/2 x N1 + (D2 x 0.9) 1/2 x N2, wherein total fineness of a warp yarn is D1 (dtex), warp yarn density is N1 (yarns/2.54 cm), total fineness of a weft yarn is D2 (dtex), and weft yarn density is N2 (yarns/2.54 cm).
  • Patent Document 1 a method in which weaving density of a selvage portion is made higher than weaving density of a main body part of a woven fabric at the time of weaving
  • Patent Document 2 a method in which additional yarns are beaten up into a selvage portion formed of ground yarns and binding yarns
  • Patent Document 3 a method in which a binding yarn having a hetero-cross-section is used for a part of a plurality of additional yarns provided at an outside of the woven fabric
  • Patent Document 4 a method in which a section shape of a warp yarn at a selvage portion is made flat
  • Patent Document 5 a method in which, by an air jet loom or a water jet loom, a pair of grip rollers is provided at an arrival portion of a running weft yarn, tension for breaking the weft yarn running is applied to the weft yarn for a predetermined time until reed beating of a cloth fell is completed, and spring back of the warp yarn is held down
  • Patent Document 6 a method in which a device which tightens a weft yarn similarly provided at an arrival portion of a weft yarn is driven and controlled.
  • Patent Document 1 JP-A-H09-302549 ; Patent Document 2: JP-A-H09-302550 ; Patent Document 3: JP-A-2001-355143 ; Patent Document 4: JP-A-2003-221749 ; Patent Document 5: JP-A-H10-46445 ; and Patent Document 6: JP-A-H10-298850 .
  • JP-A-50-136463 proposes a gripping device to be mounted on a loom which includes a belt-type clasping device H and a heat cutter 12 for cutting weft yarn between the selvage and the woven fabric.
  • any of the above-described conventional technologies has a problem in that complicated control is required to grip the running weft yarn, which thereby leads to an increase in cost for manufacturing the woven fabric.
  • an object of the present invention is to provide a selvage portion gripping device for a loom capable of effectively suppressing occurrence of cloth fell retreat at a selvage portion or warp yarn looseness in a base cloth selvage portion when a high-density woven fabric is woven at a high speed, a loom, and a method for manufacturing the woven fabric.
  • the present invention provides a loom, on which a selvage portion gripping device is mounted, and as defined in the accompanying claim 1. Further aspects of the invention concern methods for manufacturing a woven fabric, as defined in the accompanying claims.
  • a selvage portion gripping device is mounted on the loom, the selvage portion gripping device including: a space where a selvage portion can pass in which the selvage portion formed by weaving additional yarns and weft yarns can pass through in a woven fabric forwarding direction; a tiny space where the weft yarn can move in which the weft yarn can pass through; and a means for maintaining a woven condition of the selvage portion even when the weft yarn is cut with a weft yarn cutter of the loom.
  • the selvage portion gripping device exists at a selvage portion of a woven fabric and at a position where a weft yarn is cut with a weft yarn cutter.
  • Still another aspect of the present invention is: (4) A method for manufacturing a woven fabric where a predetermined number of warp yarns are parallelized, additional yarns are parallelized at an outside of the parallelized warp yarns, and a weft yarn is supplied and weft-inserted into the warp yarns and the additional yarns, the method including: by using the loom of the first aspect of the invention, gripping a selvage portion by a selvage portion formed by weaving additional yarns and weft yarns with a gripping device for a loom which exists on the loom at the time of cutting the weft yarn. The method also includes, after cutting the weft yarn, gradually separating the additional yarns from the selvage portion discharged from the selvage portion gripping device for the loom together with movement of the woven fabric.
  • the selvage portion is disposed inside the selvage portion gripping device and is configured so as to maintain the woven condition thereof. Accordingly, occurrence of crimp of the weft yarn can be prevented, looseness of the warp yarn can be prevented, and warp yarn looseness in a base cloth selvage portion can be effectively suppressed.
  • the selvage portion inside the selvage portion gripping device for the loom is elastically caught by the elastic part which catches the selvage portion.
  • the elastic part which catches the selvage portion is a part formed of a plate spring or an elastic member and a plate material. Accordingly, a structure is simple and inexpensive, forwarding of the selvage portion is performed more smoothly, and the woven condition between the additional yarns and the weft yarns is maintained further reliably. Consequently, occurrence of cloth fell retreat at the selvage portion of the woven fabric and the warp yarn looseness in the base cloth selvage portion can be suppressed more effectively and inexpensively.
  • weaving is performed by using the loom according to the above-described aspect (1) of the present invention, weaving can be performed while occurrence of cloth fell retreat at the selvage portion of the woven fabric or the warp yarn looseness in the base cloth selvage portion is suppressed more effectively.
  • the selvage portion is disposed inside the selvage portion gripping device and is configured so as to maintain the woven condition thereof. Accordingly, it is possible to obtain a woven fabric in which occurrence of the crimp of the weft yarn can be prevented, the looseness of the warp yarn is prevented, and warp yarn looseness in the base cloth selvage portion is effectively suppressed.
  • the additional yarns are separated from the selvage portion discharged from the selvage portion gripping device together with the movement of the woven fabric. Accordingly, cutting work of the selvage portion is not required, and the selvage portion can be reused by winding the additional yarns separately.
  • the selvage portion is configured so as to maintain the woven condition thereof. Accordingly, it is possible to obtain a woven fabric in which occurrence of the crimp of the weft yarn can be prevented, the looseness of the warp yarn is prevented, and the warp yarn looseness in the base cloth selvage portion is effectively suppressed.
  • the weaving is performed by a loom which uses fluid to insert the weft yarn, such as a water jet loom
  • the selvage portion gripping device for the loom is installed at a side of a weft yarn nozzle which is a nozzle for beating the weft yarn, and even in a case where the weft yarn is cut between the weft yarn nozzle and the selvage portion gripping device for the loom with a weft yarn cutter, the selvage portion is disposed inside the selvage portion gripping device and is configured so as to maintain the woven condition thereof. Accordingly, occurrence of the crimp of the weft yarn can be prevented, the looseness of the warp yarn can be prevented, and the warp yarn looseness in the base cloth selvage portion can be effectively suppressed.
  • a selvage portion gripping device for a loom of the present invention is a selvage portion gripping device for a loom which has a space where a selvage portion can pass in which the selvage portion formed by weaving an additional yarn and a weft yarn can pass through in a woven fabric forwarding direction and a tiny space where a weft yarn can move in which the weft yarn can move in the woven fabric forwarding direction.
  • the selvage portion gripping device further has a means for maintaining a woven condition of the selvage portion even when the weft yarn is cut with a weft yarn cutter.
  • a fringe is a weft yarn supplied from a weft yarn nozzle, and then cut and protruded from the woven fabric.
  • the additional yarn is a yarn inserted into an outside of the woven fabric in a warp direction in order to catch the fringe apart from a ground yarn of the woven fabric. Since the weft yarns are weft-inserted into the additional yarns as with the warp yarns, a condition in which the additional yarns and the weft yarns are intersected by vertically changing their positions, i.e., a woven condition, is formed.
  • the selvage portion is a portion where the fringes and the additional yarns are woven.
  • Fig. 1 is a schematic plan view showing an outline of weaving in a case where the selvage portion gripping device for the loom of the present invention is installed at a weft yarn nozzle side.
  • "1" indicates a warp yarn
  • "2” indicates an additional yarn
  • "3" indicates a reed
  • "4" indicates a weft yarn nozzle
  • "5" indicates a weft yarn
  • "6” indicates a weft yarn cutter
  • "7” indicates a selvage portion gripping device for a loom
  • "8” indicates a fringe
  • “9” indicates an edge dent of the reed.
  • the weft yarn 5 supplied from the weft yarn nozzle 4 is weft-inserted into the additional yarns 2 supplied from a device which supplies the additional yarns (not shown) and into the warp yarns 1 supplied from a device which supplies the warp yarns (not shown) .
  • the weft yarn 5 weft-inserted into the warp yarns 1 is beaten up by the reed 3 and the edge dent of the reed 9, and a woven fabric 10 and a selvage portion 11 are formed.
  • a tip of the beaten weft yarn 5 is normally caught by catch-cords (not shown) or the like, and weft yarn tension is maintained for a predetermined time. After that, the tip of the weft yarn 5 is cut between the woven fabric 10 and the catch-cords with a cutter allocated at an opposite side of the weft yarn nozzle (not shown), and the catch-cords are collected.
  • the selvage portion 11 where the additional yarns 2 and the weft yarns 5 are woven is supplied to the selvage portion gripping device for the loom 7 without being reed-beaten, and is moved inside the selvage portion gripping device synchronously with movements of the woven fabric 10 and the fringes 8. At this time, the weft yarn 5 is cut with the weft yarn cutter 6 immediately after the reed beating. However, the selvage portion 11 after the weft yarn is cut is disposed inside the selvage portion gripping device, and the woven condition is maintained. Accordingly, occurrence of crimp of the weft yarn or occurrence of looseness of the warp yarn can be prevented.
  • the selvage portion 11 after the weft yarn have been cut is discharged from the selvage portion gripping device as it is, and is moved together with the woven fabric 10.
  • the selvage portion 11 is discharged from the selvage portion gripping device for the loom, the woven condition of the additional yarns 2 and the fringes 8 is not maintained.
  • the fringes 8 are gradually separated from the additional yarns 2 and move.
  • the additional yarns 2 move independently. Further, the woven fabric 10 and the fringes 8 move together.
  • the additional yarns 2 are collected in the same route as that of the catch-cords allocated at the opposite side of the weft yarn nozzle through a guide (not shown) or by another winding device.
  • a length for gripping the selvage portion i.e., a length in a longitudinal direction of the woven fabric where the selvage portion is held down by the means for maintaining the woven condition of the selvage portion of the woven fabric, and hereinafter referred to as "selvage portion gripping length" is preferably 2 to 15 mm, and more preferably 3 to 10 mm.
  • a width for gripping the selvage portion i.e., a length in a direction vertical to the longitudinal direction of the woven fabric where the selvage portion gripping device for the loom grips the selvage portion (a direction where the additional yarns which form the selvage portion are arranged), and hereinafter referred to as "selvage portion gripping width" be a width capable of gripping the entire selvage portion.
  • the width is not limited to the above-described width as long as the high tension can be maintained even when the weft yarn is cut after the reed beating so as to stabilize the woven fabric structure.
  • the selvage portion gripping device for the loom is only disposed at the weft yarn nozzle side of the woven fabric 10. However, the device may be disposed at the opposite side of the weft yarn nozzle. In a case where the selvage portion gripping device for the loom is disposed at the opposite side of the weft yarn nozzle, it is preferable that the device be provided between the woven fabric and the weft yarn cutter allocated at the opposite side of the weft yarn nozzle.
  • the additional yarns be parallelized at the opposite side of the weft yarn nozzle of the woven fabric, that the selvage portion woven with the beaten weft yarns be formed, and that the selvage portion gripping device for the loom be disposed near a reed beating portion of the selvage portion. It is more preferable that the selvage portion gripping device for the loom allocated at the side of the weft yarn nozzle and the selvage portion gripping device for the loom allocated at the opposite side of the weft yarn nozzle be disposed opposite to each other via the warp yarns of the woven fabric so as to maintain weft yarn tension.
  • Fig. 2 is an enlarged schematic perspective view of a case where the selvage portion gripping device for the loom 7 according to the present invention is installed at the weft yarn nozzle 4 side.
  • "1" indicates the warp yarn
  • "2" indicates the additional yarn
  • "4" indicates the weft yarn nozzle
  • "5" indicates the weft yarn
  • "8” indicates the fringe
  • "10” indicates the woven fabric
  • "11" indicates the selvage portion.
  • the woven fabric 10 is forwarded from a right upper side in the drawing to a left lower side in the drawing. Further, the plurality of warp yarns further exists and the weft yarn 5 is further extended at a right upper portion in the drawing. However, the illustration is omitted.
  • the selvage portion gripping device for the loom 7 be provided at least at the weft yarn nozzle side of the woven fabric 10. In addition, it is preferable that the device 7 be further provided at the opposite side of the weft yarn nozzle.
  • the selvage portion gripping device for the loom 7 includes an outlet 71B of the selvage portion of a space where the selvage portion can pass in which the selvage portion 11 formed by weaving the additional yarns 2 and the weft yarns 5 can pass through in the woven fabric forwarding direction and an inlet 71A (not shown) of the selvage portion of the space where the selvage portion can pass formed at upper reaches of the additional yarns 2 of the selvage portion gripping device for the loom 7.
  • An outlet 72B of the selvage portion is a tiny space portion where the weft yarn can move and which is at the woven fabric side for which the fringes 8 move parallel to the forwarding direction of the woven fabric 10.
  • a tiny space where the weft yarn can move and which is allocated at the weft yarn nozzle side 72A (not shown) is formed at the weft yarn nozzle side of the selvage portion gripping device for the loom 7.
  • the selvage portion 11 enters the space portion where the selvage portion can pass from the inlet 71A of the space where the selvage portion can pass along the forwarding direction of the woven fabric 10.
  • the fringes 8 are gripped by a gripping means provided between the tiny space where the weft yarn can move and which is allocated at the weft yarn nozzle side 72A and the tiny space where the selvage portion can move and which is allocated at the woven fabric side 72B.
  • the fringes 8 move inside the space where the selvage portion can pass parallel to the forwarding direction of the woven fabric 10. Even in a case where the weft yarn 5 is cut with the weft yarn cutter between the weft yarn nozzle 4 and the selvage portion gripping device for the loom 7, the woven condition of the selvage portion is maintained.
  • a sliding member which does not prevent movement of the selvage portion in the space where the selvage portion can pass can be cited.
  • a method in which a dimension of the space where the selvage portion can pass is appropriately set according to a dimension of the selvage portion so as to be capable of gripping the selvage portion 11 can be employed.
  • a method in which an elastic part which catches a selvage portion which elastically catches the selvage portion is arranged in the space where selvage portion can pass of the selvage portion gripping device for the loom is simpler and more reliable.
  • the elastic part which catches the selvage portion is provided inside the space where selvage portion can pass.
  • a rubber plate or a resin plate can be used, or a member formed of an elastic member, such as a coil spring or a rubber, and a plate material made of a metal or the like can be used.
  • a fixed plate spring in the space where the selvage portion can pass in terms of a structure and simplicity, i.e., cost.
  • a portion of the elastic part which catches the selvage portion which is in contact with the selvage portion have a surface having a low abrasion property.
  • Fig. 3 is a schematic sectional view of the selvage portion gripping device for the loom which uses a pair of plate springs 74A, 74B as the elastic part which catches the selvage portion.
  • Fig. 3 corresponds to a case where the device is taken along a surface orthogonal to the weft yarns 5 in Fig. 2 .
  • the woven fabric is forcibly taken off by a winding roll in the weaving. Accordingly, in a condition where the additional yarns 2 and the weft yarns 5 are woven, the selvage portion 11 is moved from a right side to a left side in the drawing, i.e., from the inlet 71A of the space where the selvage portion can pass to the outlet 71B of the space where the selvage portion can pass.
  • "74A” and "74B” indicate a pair of carbon steel catching parts, such as plate springs, provided inside the space portion where the selvage portion can pass, and are respectively fixed to upper and lower wall surfaces of the space portion where the selvage portion can pass by two bolts 73.
  • the selvage portion 11 provided in the space portion where the selvage portion can pass is caught by the plate springs 74A, 74B serving as the elastic selvage portion parts from the upper and lower surfaces. Even in a case where the weft yarn 5 is cut between the weft yarn nozzle 4 and the selvage portion gripping device for the loom 7, the cut weft yarn 5 is prevented from slipping out from the selvage portion 11 or from loosening, and the woven condition of the selvage portion 11 is maintained inside the selvage portion gripping device for the loom 7. The selvage portion 11 is moved inside the space portion where the selvage portion can pass and discharged from the selvage portion gripping device for the loom 7. The woven fabric 10 is moved together with the fringes 8.
  • the woven condition between the additional yarns 2 and the cut fringes 8 are loosened, the cut fringes 8 are gradually separated from the additional yarns 2, and the additional yarns 2 move independently and are separated from the woven fabric 10 and the fringes 8.
  • the elastic part which catches the selvage portion is formed in a pair.
  • One plate spring disposed on the upper (or the lower) wall surface and a lower side (or an upper side) thereof inside the selvage portion passage section may be provided.
  • the plate spring can employ various shapes. However, in order to catch the selvage portion by uniform stress over a constant length, as in Fig. 3 , it is preferable to use the pair of plate springs 74A, 74B which respectively has a planar shape and two arc shapes at both ends thereof.
  • a length or a width of a portion having the planar shape, a thickness of the plate spring, and the like may be appropriately set. Accordingly, the woven condition of the selvage portion can be maintained in a degree that the crimp of the weft yarn after the weft yarn is cut or the looseness of the warp yarn is not generated at the selvage portion discharged from the selvage portion gripping device 7. Further, as the material, stainless steel, phosphor bronze, beryllium copper, resin, or the like can be employed as well as the carbon steel.
  • Fig. 4 is a schematic sectional view of the selvage portion gripping device for the loom 7 shown in Fig. 3 which is taken along a surface orthogonal to a forwarding direction of the additional yarns 2.
  • "72A” indicates the tiny space where the weft yarn can move for the weft yarn at the weft yarn nozzle side (before cutting and after cutting) to move together with the selvage portion
  • "72B” indicates the tiny space where the weft yarn can move for the weft-inserted weft yarn 5 to move in the forwarding direction of the woven fabric 10.
  • tiny space where the weft yarn can move 72A, 72B can adjust a clearance so that the weft yarn can pass through and a woven portion between the additional yarns and the weft yarns in the woven condition (i.e., the selvage portion) cannot pass through. Accordingly, even in a case where the weft yarn is cut at the weft yarn nozzle side, the woven condition is maintained, and there is no occurrence of a crimp of the weft yarn caused by slipping-out or looseness of the cut weft yarn or no occurrence of a loosen fringe caused by the looseness of the warp yarn. Therefore, it is preferable that a height of the tiny space where the weft yarn can move be smaller than heights of the inlet and the outlet of the space portion where the selvage portion can pass.
  • the woven fabric woven by using the selvage portion gripping device for the loom according to the present invention is particularly useful when weaving a high-density woven fabric used for sportswear, industrial materials, or the like.
  • the present invention is not limited to this.
  • the yarn for the warp yarn or the weft yarn used for weaving is not particularly limited, and a chemical fiber, a natural fiber, or the like can be used.
  • a chemical fiber for example, a polyamide-based fiber, a polyester-based fiber, an aramid-based fiber, a rayon-based fiber, a polysulfone-based fiber, a super high molecular weight polyethylene-based fiber, or the like can be used.
  • the natural fiber cotton, hemp, silk, wool, or the like can be used.
  • the chemical fiber is preferable.
  • the polyamide-based fiber and the polyester-based fiber which are excellent in mass productivity and economy are preferable.
  • the polyamide-based fiber is further preferable from a viewpoint of heat resistance and less fluff of the fiber.
  • polyamide-based fiber for example, fibers made of Nylon 6, Nylon 66, Nylon 12, Nylon 46, a copolymerized polyamide of the Nylon 6 and the Nylon 66, copolymerized polyamides formed by copolymerizing the Nylon 6 with polyalkylene glycol, dicarboxylic acid, amine, and the like can be cited.
  • polyester-based fiber for example, fibers made of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and the like can be cited.
  • a fiber formed by copolymerizing the polyethylene terephthalate or the polybutylene terephthalate with isophthalic acid, or 5-sodium sulfoisophthalic acid as an aromatic dicarboxylic acid component, or a fiber formed by copolymerizing the polyethylene terephthalate or the polybutylene terephthalate with aliphatic dicarboxylic acid, such as adipic acid, may be used as well.
  • these synthetic fibers may contain an additive, such as a heat stabilizer, an antioxidant, a light stabilizer, a smoothing agent, an antistatic agent, a plasticizer, a thickener, a pigment, a flame retardant, and the like.
  • an additive such as a heat stabilizer, an antioxidant, a light stabilizer, a smoothing agent, an antistatic agent, a plasticizer, a thickener, a pigment, a flame retardant, and the like.
  • a multifilament yarn is preferably used from a point of significantly achieving the effects of the present invention.
  • a sectional shape of a single yarn is not limited to a round shape and may be formed in any shape.
  • the sectional shape may be a laterally symmetrical shape, such as a flat shape, a rectangular shape, a rhomboid, or a cocoon shape, or a laterally asymmetrical shape.
  • the sectional shape may be a shape combining any of these.
  • the sectional shape may have a protrusion or unevenness.
  • the yarn may be a hollow yarn.
  • a plain weave, a twill weave, a satin weave, a variation of these weaves, and the like can be used for the woven fabric manufactured by using the selvage portion gripping device for the loom according to the present invention.
  • the present invention is not particularly limited to these weaves.
  • the woven fabric manufactured by using the selvage portion gripping device for the loom according to the present invention is woven using the warp yarn, the weft yarn, and the additional yarn as basic yarns.
  • the additional yarn catches the weft yarn by utilizing its rigidity and prevents looseness of the weft yarn.
  • the additional yarn forms the selvage portion by weaving with the weft yarn.
  • a predetermined number of the warp yarns are parallelized, and the additional yarns are further parallelized at the outside of the parallelized warp yarns.
  • the weft yarn is supplied and beaten up, and the woven fabric is manufactured. As described above, after the woven condition between the supplied weft yarns and the additional yarns is maintained near the reed beating portion of the selvage portion by the selvage portion gripping device for the loom, the selvage portion is discharged from the selvage portion gripping device for the loom of the woven fabric.
  • the selvage portion gripped by the selvage portion gripping device for the loom is moved synchronously with the movement of the woven fabric inside the selvage portion gripping device for the loom, and discharged thereafter.
  • the discharged selvage portion is moved together with the movement of the woven fabric.
  • the additional yarns are gradually separated from the portion of the cut weft yarn of the selvage portion where the weft yarn is cut, the finished woven fabric does not include the additional yarns.
  • the additional yarn is supplied from a supply device different from the warp yarn. While the warp yarns are passed through healds and reeds, the additional yarns are not passed through the reeds.
  • the additional yarns form the selvage portion together with the weft yarns woven by opening movements similar to the warp yarns, and are passed through the selvage portion gripping device for the loom.
  • the additional yarns are supplied from the vicinity of a warp yarn beam, a load is applied to the additional yarns by a spring type tensioner, and the additional yarns are passed through the opened healds.
  • the weft yarn is run by high-pressure water or pressured air and the warp yarn and the weft yarn are beaten up by the reed, the weft yarn is cut with the weft yarn cutter.
  • the selvage portion gripping device for the loom grips the selvage portion so as to maintain the woven condition of the selvage portion, slipping-out of the cut weft yarn from the selvage portion or looseness thereof is suppressed.
  • the cloth fell is expressed by a distance from a top of a temple to the cloth fell.
  • the weft yarn is run by the high-pressure water or the pressured air, high tension acts on the weft yarn.
  • the weft yarn is cut with the cutter after the weft yarn is beaten up by the reed, the free end portion of the weft yarn returns to a ground side of the woven fabric. Due to the decline in the weft yarn tension at the selvage portion of the woven fabric, the crimp of the weft yarn increases, and conversely the crimp of the warp yarn at the selvage portion decreases. Accordingly, the warp yarn tension at the selvage portion becomes low.
  • the additional yarns are normally supplied from a cone or a paper tube without using a leno yarn device or a bobbin.
  • a spring washer it is preferable to use a spring washer to manage the tension when the additional yarns are supplied.
  • the additional yarn be a multifilament and a crimped yarn.
  • a material of the additional yarn is not particularly limited. However, polyester or nylon is easily available in general. It is preferable to select the material of the additional yarn similar in yarn characteristics to the warp yarn.
  • total fineness of the additional yarns be larger than total fineness of the weft yarns.
  • the number of additional yarns be four to eight yarns.
  • the woven fabric using the selvage portion gripping device for the loom according to the present invention can be subjected to high-speed operation, it is preferable that the woven fabric be woven by a jet loom.
  • a water jet loom is preferable from a point of conspicuously exhibiting the effects of the present invention.
  • the water jet loom runs the weft yarns by the high-pressure water, beats up the weft yarns, and then cuts the weft yarns at the weft yarn nozzle side.
  • the water jet loom tends to have high running tension of the weft yarns, and further improvement of gripping force of the weft yarn at the selvage portion is requested. Accordingly, at the time of high-speed operation or a wide woven fabric in particular, the effect obtained by use of the added yarns (additional yarns) and by the selvage portion gripping device for the loom according to the present invention becomes more conspicuous.
  • the high-density woven fabric is woven by using the selvage portion gripping device for the loom according to the present invention
  • scouring/heat set processing be performed to dry and/or remove an oil agent adhered to original yarns and remove wrinkles.
  • a width of the woven fabric is not particularly limited. However, since the warp yarn looseness in the base cloth selvage portion easily occurs as the woven fabric is wider, the device is particularly useful for the woven fabric having a region where only the warp yarns exist of 140 cm or more, and particularly of 180 cm or more. It is preferable that an upper limit of the width be 280 cm or less in manufacturing.
  • the above-described yarns are used for the warp yarns, the additional yarns, and the weft yarns.
  • the warp yarns and the additional yarns whose fineness is in proportion to woven fabric design are arranged for the warp and set in the loom.
  • the weft yarns are prepared in the same manner.
  • the additional yarn to be used is normally thicker than the warp yarn.
  • the tension of the warp yarn and the additional yarn is preferably 10 to 250 cN/yarn, and more preferably 20 to 200 cN/yarn.
  • the tension in such a range a tiny space between single fibers in a yarn bundle of the yarns that configures the woven fabric can be reduced, and a dense woven fabric can be obtained.
  • the warp yarns tensioned as described above force the weft yarn to bend so that structure-restraining force of the woven fabric in the weft yarn direction is enhanced, an anti-yarn slippage property of the woven fabric improves, and a seam portion of a sewn product can be strengthened.
  • the warp yarn tension is small, a contact area between the warp yarns and the weft yarns in the woven fabric cannot be increased, and edge comb resistance cannot be obtained to a desirable extent. Further, an effect of reducing the tiny space between the single fibers is small. If the warp yarn tension is excessively great, the warp yarns tend to produce fluff due to abrasion at heald mails.
  • a method for adjusting the warp yarn tension within the above-described range a method in which an inserting speed of the weft yarn is adjusted besides adjusting a forwarding speed of the warp yarn of the loom can be cited.
  • Whether the warp yarn tension is actually within the above-described range during weaving can be checked by, for example, measuring the tension that acts per warp yarn at an intermediate point between the warp yarn beam and a back roller during operation of the loom. Further, it is preferable to provide a difference between tension of an upper sheet of the warp yarn and tension of a lower sheet of the warp yarn at the warp yarn opening.
  • an adjustment method there is, for example, a method in which a difference in a running line length between the upper yarns and the lower yarns is provided by installing a back roller level to, for example, about 10 to 30 mm higher than a horizontal position and the like.
  • a back roller level to, for example, about 10 to 30 mm higher than a horizontal position and the like.
  • another method of providing a difference between the tension of the upper yarns and the tension of the lower yarns there is, for example, a method in which a cam drive system is adopted in an opening device, and a dwell angle for the other side of the upper yarns/the lower yarns is made 100 degrees greater than that of the other. The tension of the warp yarn with the increased dwell angle is higher.
  • processing such as scouring, heat set, or the like is performed after the weaving process.
  • occurrence of cloth fell retreat at the selvage portion or occurrence of the warp yarn looseness in the base cloth selvage portion can be effectively prevented even in the high-speed weaving.
  • occurrence of the warp yarn looseness in the base cloth selvage portion is extremely suppressed.
  • the woven fabric can be cut into a shape as designed and also easy to sew. Further, since occurrence of the warp yarn looseness in the base cloth selvage portion is suppressed, waste of the woven fabric is small, and the woven fabric is advantageous in terms of cost.
  • Total fineness was obtained by measuring fineness based on corrected mass with a predetermined load of 0.045 cN/dtex according to a JIS L 1013:2010 8.3.1 A method.
  • Measurement was performed based on JIS L 1096:2010 8.6.1. Each sample was placed on a flat table, and unnatural wrinkles and tension were removed. Then, at five different locations, the numbers of warp yarns and weft yarns in sections of 2.54 cm were counted, and average values for the warp yarn and the weft yarn were calculated.
  • two marks are put on a central portion in a width direction of the woven fabric 10 at an interval of 500 mm.
  • Two lines (103A, 103B) are drawn along the weft yarns from the marks 102A, 102B at the respective central portions of the woven fabric in a direction of an end portion 101A at the weft yarn nozzle side of the woven fabric and in a direction of an end portion 102B at the opposite side of the weft yarn nozzle of the woven fabric.
  • the end portions 101A, 102B are width direction both ends. In this case, the woven condition of the woven fabric 10 tends to be loose at both the sides as compared with the central portion.
  • the two lines bend toward the cloth fell on both the sides, and an interval between the two lines, i.e., the lines 103A, 103B in the direction of the weft yarn, tends to be wider at peripheral portions than the central portion.
  • a distance between the two lines 103A, 103B in the weft yarn direction at the central portion of the woven fabric is 500 mm
  • an interval between the two lines 103A and 103B in the direction of the weft yarn becomes wider at the end portion 101A allocated at the weft yarn nozzle side of the woven fabric and the end portion 101B allocated at a side which is not the weft yarn nozzle side of the woven fabric.
  • the end portions 101A, 101B are the both sides.
  • lines i.e., lines 104A, 104B in the warp yarn direction
  • lines are drawn between the two lines 103A, 103B in the direction of the weft yarn at an interval of 20 mm from the end portion 101A allocated at the weft yarn nozzle side of the woven fabric and from the end portion 101B allocated at the opposite side of the weft yarn nozzle of the woven fabric.
  • the end portions are the both sides of the woven fabric.
  • the woven fabric is cut along the lines 103A, 103B in the direction of the weft yarn and the lines 104A, 104B in the direction of the warp yarn, thereby obtaining two strip-shaped bodies generated at the end portions of the woven fabric and having shapes close to rectangles. Lengths in the warp direction, (i.e., a length direction) of the strip-shaped bodies were measured, and the warp yarn looseness in the base cloth selvage portion was evaluated.
  • Multifilament yarns formed of polyester and having a circular sectional shape, with single fiber fineness of 2.33 dtex, the number of filaments being 36, total fineness of 84 dtex, no twist provided, strength of 4.21 cN/dtex, and elongation of 40% were prepared.
  • a plain weave fabric was woven with warp yarn tension during weaving being 20 cN/yarn, loom rotation speed being 500 rpm, warp yarn density being 133 yarns/2.54 cm, weft yarn density being 133 yarns/2.54 cm, and a width (a width of a portion where the warp yarns exist) being 200 cm.
  • additional yarns 3 ply textured yarns formed of polyester and having a circular sectional shape, with single fiber fineness of 3.44 dtex, the number of filaments being 96 f, and total fineness of 330 dtex were used.
  • Four additional yarns were supplied and parallelized to each of the two outsides of the warp yarns where a predetermined number of yarns were parallelized, and were supplied by setting additional yarn tension to 130 cN/yarn. A clearance of 5 mm was provided between the warp yarn and the additional yarn as a fringe. The fringes of the discharged selvage portion were gradually separated from the additional yarns, and the additional yarns were collected in the same route as the catch-cords at the opposite side of the weft yarn nozzle through a guide.
  • the selvage portion gripping device for the loom in Fig. 3 includes the space portion where the selvage portion can pass in which the selvage portion formed by weaving the additional yarns and the weft yarns can pass through in the woven fabric forwarding direction and the tiny space portion where the weft yarn can move in which the weft yarn can move in the woven fabric forwarding direction, and further includes a pair of plate springs arranged at the space portion where the selvage portion can pass.
  • the two selvage portion gripping devices for the loom were respectively installed at the end allocated at the weft yarn nozzle side and at the end allocated at the opposite side of the weft yarn nozzle near the reed beating portion of the loom.
  • a main body of the selvage portion gripping device for the loom 7 is made of stainless steel and has a rectangular parallelepiped shape (6 mm in width, 30 mm in height, 25 mm in length).
  • the selvage portion gripping device for the loom 7 includes the inlet 71A of the space where the selvage portion can pass which has a width of 4 mm and a height of 10 mm and the outlet 72A of the space where the selvage portion can pass.
  • the two elastic parts which catch the selvage portion are vertically provided in the space where the selvage portion can pass.
  • the two elastic parts which catch the selvage portion are respectively configured by the plate springs 74A, 74B and plate spring supporting bodies 75A, 75B.
  • the plate springs 74A, 74B are respectively made of stainless steel having a thickness of 0.3 mm, have the arc-shaped portions at both ends of the flat plate portion having a length of 20 mm, and are fixed to the plate spring supporting bodies 75A, 75B by bolts.
  • a selvage portion gripping length was set to 20 mm
  • a selvage portion gripping width was set to 4 mm.
  • the selvage portion was configured to be caught so that the selvage portion passes between the flat plate portions of the pair of plate springs synchronizing with a flow of the woven fabric. Further, as shown in Fig.
  • the tiny space where the weft yarn can move and which is allocated at the weft yarn nozzle side 72A and the tiny space portion where the selvage portion can move and which is allocated at the woven fabric side 72B are formed on both the side surfaces of the selvage portion gripping device for the loom 7.
  • a widths of these tiny spaces are formed slightly larger than a diameter of the weft yarn and smaller than a thickness of the selvage portion where the weft yarns and the additional yarns are woven.
  • the weaving was performed according to a method similar to the method in Example.
  • Example and Comparative Example were evaluated according to the above-described evaluation method of the warp yarn looseness in the base cloth selvage portion. Lengths of the strip-shaped bodies are shown. As is evident from this, occurrence of cloth fell retreat at the selvage portion of the woven fabric and the warp yarn looseness in the base cloth selvage portion were decreased in the woven fabric woven by using the selvage portion gripping device for the loom according to the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Claims (5)

  1. Webmaschine, auf der eine Schussgarndüse (4), eine Schussgarnschneidvorrichtung (6) und eine Kantenabschnitt-Greifvorrichtung (7) angebracht sind, wobei die Kantenabschnitt-Greifvorrichtung (7) an einer Position vorhanden ist, an der ein Schussgarn (5) mit der Schussgarnschneidvorrichtung (6) durchzuschneiden ist,
    wobei die Kantenabschnitt-Greifvorrichtung (7) einen Raum, den ein Kantenabschnitt (11) durchlaufen kann, durch den der durch Weben von zusätzlichen Garnen (2) und Schussgarnen (5) gebildete Kantenabschnitt (11) in eine Webstoff-Vorwärtsrichtung hindurchlaufen kann, einen sehr kleinen Raum (72A, 72B), in dem das Schussgarn (5) laufen kann, durch den das Schussgarn (5) hindurchlaufen kann, und ein Mittel zum Aufrechterhalten eines Webzustands des Kantenabschnitts (11), selbst dann, wenn das Schussgarn (5) mit einer Schussgarnschneidvorrichtung (6) der Webmaschine durchgeschnitten wird, umfasst,
    wobei die Kantenabschnitt-Greifvorrichtung (7) lediglich an einer Schussgarndüsenseite des Webstoffes (10) angeordnet oder sowohl an der Schussgarndüsenseite als auch an einer der Schussgarndüse (4) gegenüberliegenden Seite angeordnet ist,
    dadurch gekennzeichnet,
    dass, wenn die Kantenabschnitt-Greifvorrichtung (7) an der Schussgarndüsenseite angeordnet ist, eine Schussgarnschneidvorrichtung (6) zwischen der Schussgarndüse (4) und der Kantenabschnitt-Greifvorrichtung (7) bereitgestellt ist, und wenn die Kantenabschnitt-Greifvorrichtung (7) an der der Schussgarndüse (4) gegenüberliegenden Seite angeordnet ist, die Kantenabschnitt-Greifvorrichtung (7) zwischen einer Schussgarnschneidvorrichtung (6) bereitgestellt ist, die an der gegenüberliegenden Seite von der Schussgarndüse (4) und des Webstoffs (10) bereitgestellt ist.
  2. Webmaschine gemäß Anspruch 1, wobei das Mittel zum Aufrechterhalten des Webzustands des Kantenabschnitts (11) in der Kantenabschnitt-Greifvorrichtung (7) ein elastisches Teil (74A, 74B) ist, das den Kantenabschnitt (11) auffängt, der dem Raum zugeordnet ist, den der Kantenabschnitt durchlaufen kann.
  3. Webmaschine gemäß Anspruch 2, wobei in dem elastischen Teil (74A, 74B), das den Kantenabschnitt (11) auffängt, ein Teil vorhanden ist, das aus einer Tellerfeder oder einem elastischen Element und einem Plattenmaterial gebildet ist.
  4. Verfahren zur Herstellung eines Webstoffs (10), wobei eine vorbestimmte Anzahl von Kettgarnen (1) parallel gerichtet ist, zusätzliche Garne (2) an einer Außenseite der parallel gerichteten Kettgarne (1) parallel gerichtet sind, und ein Schussgarn (5) zugeführt und in die Kettgarne (1) und die zusätzlichen Garne (2) schusseingetragen wird, wobei das Verfahren Folgendes umfasst: durch Verwendung der Webmaschine gemäß einem der Ansprüche 1 bis 3, Ergreifen eines Kantenabschnitts (11), der durch das Weben von zusätzlichen Garnen (2) und Schussgarnen (5) gebildet wird, mit der Kantenabschnitt-Greifvorrichtung (7) zum Zeitpunkt des Durchschneidens des Schussgarns (5), und, nach Durchschneiden des Schussgarns (5), allmähliches Trennen der zusätzlichen Garne (2) von dem Schussgarn (5), das zusammen mit der Bewegung des Webstoffs aus der Kantenabschnitt-Greifvorrichtung (7) austreten gelassen wird.
  5. Verfahren zur Herstellung eines Webstoffs gemäß Anspruch 4, wobei zusätzliches Garn (2) mit einer Gesamtfeinheit, die größer als eine Gesamtfeinheit des Schussgarns ist, verwendet wird.
EP14846374.8A 2013-09-17 2014-09-12 Kantenhaltevorrichtung für webmaschinen, webmaschine und verfahren zur herstellung eines gewebes Active EP3048194B1 (de)

Applications Claiming Priority (2)

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JP2013191624 2013-09-17
PCT/JP2014/074267 WO2015041176A1 (ja) 2013-09-17 2014-09-12 織機用耳部把持装置、織機および織物の製造方法

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JP (1) JP6256350B2 (de)
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IT201900014982A1 (it) * 2019-08-23 2021-02-23 Santex Rimar Group S R L Dispositivo per il risparmio della trama in macchine per tessere

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JPWO2015041176A1 (ja) 2017-03-02
CN105531412A (zh) 2016-04-27
EP3048194A4 (de) 2017-06-14
CN105531412B (zh) 2018-02-13
JP6256350B2 (ja) 2018-01-10
EP3048194A1 (de) 2016-07-27
MX2016003361A (es) 2016-06-24
WO2015041176A1 (ja) 2015-03-26
US20160222555A1 (en) 2016-08-04
KR20160056903A (ko) 2016-05-20

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